CN108071594A - The steady low formula boiler feed pump that shakes of water conservancy diversion - Google Patents
The steady low formula boiler feed pump that shakes of water conservancy diversion Download PDFInfo
- Publication number
- CN108071594A CN108071594A CN201710635998.6A CN201710635998A CN108071594A CN 108071594 A CN108071594 A CN 108071594A CN 201710635998 A CN201710635998 A CN 201710635998A CN 108071594 A CN108071594 A CN 108071594A
- Authority
- CN
- China
- Prior art keywords
- guide vane
- conservancy diversion
- water conservancy
- stage casing
- body guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Abstract
The invention discloses a kind of steady low formula boiler feed pumps that shakes of water conservancy diversion, including inlet segment (14), stage casing (16), water exit end (17) etc., equipped with guide vane piece (5) and back of the body guide vane (6) on its guide vane, shunting groove (8) is equipped on the back of the body guide vane, and is connected at the lower part of the back of the body guide vane and is lengthened guide vane (9) and be sleeved in the entrance of secondary impeller (23).Fastener hole (7) is additionally provided on back of the body guide vane, positioning groove (4) is housed on guide vane.The present invention extends water conservancy diversion distance, shortens the distance of back of the body guide vane and secondary impeller entrance edge of blade, liquid is made steadily to flow into secondary impeller, effectively reduces interaction between whirlpool and pump shaft is collided.And respectively by fastener hole and pin, positioning groove and slotted screw and stage casing in the horizontal direction with fastened on direction of rotation, avoid causing extraneous vibration, improve pump assembly running stability, vibration parameters index is up to standard and safe.
Description
Technical field
The present invention relates to a kind of centrifugal multistage pump multiple centrifugal pump, a kind of feedwater occasion used more particularly to power plant, industry and city
Boiler feed pump.
Background technology
Boiler feed pump is generally sectional type or double shell centrifugal multistage pump multiple centrifugal pump, is mainly used for middle pressure, sub-high pressure increase-volume and height
Boiler feedwater is pressed, pumped (conveying) medium is water, and temperature range is often between 104-160 DEG C, and flow is in 28-500m3/ h, outlet pressure
10-15MPa belongs to key centrifugal pump in the feed water system of boiler, often configures " the using and the reserved ", and the unit price of pump is generally 30
~80 ten thousand yuan.When its operating mode flow is in 300-500m3During/h, operating condition is changeable, make vibration values at the parts of bearings of pump >=
4.5mm/s (being more than related standard), belongs to substandard product, has certain hidden danger.If two feed pumps all scrams,
Water supply system will entirely stop, and will bring user and manufacturer brings sizable economic loss.The vibration of its parts of bearings surpasses
Main cause is marked between guide vane grade at leakage, liquid can generate whirlpool, back of the body guide vane and secondary impeller inlet side leaf on guide vane
Piece distance is big, causes water conservancy diversion unstable, the sufficient space that whirlpool collides pump shaft can be left for, so as to cause boiler feed pump
Parts of bearings vibration exceeding the standard.
The content of the invention
It is an object of the invention to insufficient more than overcoming, and provide it is a kind of reduce or eliminate water vortex, low vibration is led
The steady low formula boiler feed pump that shakes of levelling.
The purpose of the present invention is realized by following technical solution：The steady low formula boiler feed pump that shakes of water conservancy diversion, including left axle
Bearing portion part, left pump cover, inlet segment, stage casing, water exit end, right pump cover, right bearing component, pump shaft, in the stage casing equipped with guide vane,
First stage impeller, secondary impeller, equipped with guide vane piece and back of the body guide vane on the guide vane, be equipped on the back of the body guide vane shunt it is recessed
Slot, and lengthening guide vane is connected at the lower part of the back of the body guide vane, the end for lengthening guide vane is sleeved on secondary impeller
Entrance in.
Fastener hole is additionally provided on the back of the body guide vane and is fastened in the horizontal direction with stage casing by pin, in institute
It states on guide vane and is consolidated in a rotational direction by slotted screw and stage casing equipped with positioning groove at guide vane piece
Fixed, the lengthening guide vane, which has, to be lengthened guide vane circular arc and is connected between guide vane, guide vane bushing with arc structure transition.
After structure of the present invention, liquid of the leakage at casing ring between grade has a high-energy, but with through on guide vane
The liquid velocity direction come of back of the body guide vane stream it is different, while generating whirlpool in the gap for shunting groove, whirlpool is carried on the back again
Guide vane and lengthening guide vane segmentation, reduce energy, lengthen guide vane and guide vane, the circular arc of guide vane bushing are smoothly connected, cause to put down
Steady water conservancy diversion flows to secondary impeller；It lengthens guide vane and reduces whirlpool energy, and reduce the distance with secondary impeller vane inlet,
Steady water conservancy diversion effectively reduces interaction between whirlpool and pump shaft is collided.In addition, fastener hole and pin, positioning groove
And the setting of slotted screw, it can effectively reduce or eliminate whirlpool energy and prevent from causing extraneous vibration.
Description of the drawings
Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structure diagram of vane apparatus between the steady formula grade of water conservancy diversion in Fig. 1.
Specific embodiment
According to Fig. 1, Fig. 2, the steady low formula boiler feed pump that shakes (big flow is multistage) of water conservancy diversion of the present invention, including left bearing
Component 12, left pump cover 13, inlet segment 14, stage casing 16, water exit end 17, right pump cover 20, right bearing component 21, (and the shell of pump shaft 24
Body sealing ring 22, balancing device 18, balanced water returning pipe 19), equipped with guide vane 3 (and guide vane bushing 1), chopped-off head in the stage casing 16
Impeller 15 (one), secondary impeller 23 (and casing ring 22, be it is corresponding several, the last one secondary impeller is mounted in
In water exit end 17), equipped with guide vane piece 5 and back of the body guide vane 6 on the guide vane 3, (towards secondary impeller) on the back of the body guide vane 6
Equipped with shunting groove 8, and it is connected at the lower part of the back of the body guide vane 6 and lengthens guide vane 9, the end for lengthening guide vane 9
End cap is in the entrance of secondary impeller 23 (several).
As shown in Figure 1, fastener hole 7 is additionally provided with (towards secondary impeller) on the back of the body guide vane 6 and by pin 26 with
Stage casing 16 is fastened in the horizontal direction, is passed through on the guide vane 3 and equipped with positioning groove 4 at guide vane piece
Slotted screw 25 is fixed in a rotational direction with stage casing 16, the lengthening guide vane 9 have lengthen guide vane circular arc 11 and
Connected between guide vane 3, guide vane bushing 1 with 10 transition of arc structure, be more advantageous to the steady water conservancy diversion of liquid.The back of the body guide vane
6 are equipped with fastener hole 7 and pin, the guide vane 3 equipped with positioning groove 4 and slotted screw 25, the shunting on back of the body guide vane
Groove splits whirlpool, while whirlpool energy is reduced or eliminated, also avoids caused extraneous vibration.
As shown in Fig. 2, the guide vane 3, guide vane bushing 1, guide vane piece 5 and back of the body guide vane 6 etc. form the steady formula grade of water conservancy diversion
Between vane apparatus.Wherein, guide vane 3, guide vane bushing 1 are several, and guide vane 3 is coupled with guide vane bushing 1 by screw 2.
Referring to Fig. 1, after present invention assembling, liquid enters first stage impeller 15 from inlet segment 14, by just leading on guide vane 3
Liquid guide flow is extremely carried on the back guide vane 6 by blade 5, then after the supercharging of secondary impeller 23, pressure rise, but liquid is in casing ring 22
It can occur to reveal between grade during gap flow direction back of the body guide vane 6 between secondary impeller 23, this liquid flow supports or opposes the pressure meeting of guide vane 6
More than the fluid pressure that back of the body guide vane 6 is flowed to from guide vane piece 5, two liquid stream layers can generate whirlpool in the gap of shunting groove 8.
Meanwhile the whirlpool by back of the body guide vane 6 and lengthens guide vane 9 and splits again, reduces or the energy that dissipated.The lengthening guide vane 9 has
Have and lengthen guide vane circular arc 11 and connected between guide vane 3, guide vane bushing 1 with 10 transition of arc structure, lengthen the end of guide vane 9
End cap is in secondary impeller 23, so as to extend water conservancy diversion distance, shortens back of the body guide vane 6 and the entrance edge of blade of secondary impeller 23
Distance, liquid is made steadily to flow into secondary impeller 23, effectively reduces interaction and the collision to pump shaft between whirlpool.
The present invention centrifuges feed pump smooth running for big flow boiler, and left and right parts of bearings vibration values are small, is up to standard
To key effect.On the one hand, the property examined, stability that boiler centrifugation feed pump operates in water supply system are improved；It is another
Aspect improves manufacturing enterprise's product quality, has higher competitive advantage；Also effectively prevent bringing vulnerable part more because of vibration
It changes, has saved fund, with wide popularizing application prospect and certain market space.
Claims (2)
1. the steady low formula boiler feed pump that shakes of water conservancy diversion, including left bearing component (12), left pump cover (13), inlet segment (14), stage casing
(16), water exit end (17), right pump cover (20), right bearing component (21), pump shaft (24) are equipped with guide vane in the stage casing (16)
(3), first stage impeller (15), secondary impeller (23) equipped with guide vane piece (5) and carry on the back guide vane (6), feature on the guide vane (3)
It is：Shunting groove (8) is equipped on the back of the body guide vane (6), and lengthening is connected at the lower part of the back of the body guide vane (6)
Guide vane (9), and the end for lengthening guide vane (9) is sleeved in the entrance of secondary impeller (23).
2. the steady low formula boiler feed pump that shakes of water conservancy diversion as described in claim 1, it is characterised in that：In the back of the body guide vane (6)
On be additionally provided with fastener hole (7) and fastened in the horizontal direction with stage casing (16) by pin (26), in the guide vane (3)
It is obtained in a rotational direction by slotted screw (25) and stage casing (16) equipped with positioning groove (4) at upper and close guide vane piece
With fixation, the lengthening guide vane (9) is with lengthening guide vane circular arc (11) and with circle between guide vane (3), guide vane bushing (1)
Arc structure (10) transition connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710635998.6A CN108071594A (en) | 2017-07-28 | 2017-07-28 | The steady low formula boiler feed pump that shakes of water conservancy diversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710635998.6A CN108071594A (en) | 2017-07-28 | 2017-07-28 | The steady low formula boiler feed pump that shakes of water conservancy diversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108071594A true CN108071594A (en) | 2018-05-25 |
Family
ID=62159370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710635998.6A Pending CN108071594A (en) | 2017-07-28 | 2017-07-28 | The steady low formula boiler feed pump that shakes of water conservancy diversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108071594A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975168A (en) * | 2010-11-05 | 2011-02-16 | 浙江科尔泵业股份有限公司 | Horizontal axial-suction sectional multistage high-pressure centrifugal pump |
| CN103016410A (en) * | 2013-01-04 | 2013-04-03 | 江苏大学 | Space guide vane body with suction surface back vane |
| CN103016408A (en) * | 2012-12-21 | 2013-04-03 | 大连理工大学 | One-dimensional linear hollow guide vane |
| CN103591051A (en) * | 2013-11-07 | 2014-02-19 | 江苏大学 | Space guide blade with auxiliary vanes |
| CN205654548U (en) * | 2016-05-25 | 2016-10-19 | 浙江科尔泵业股份有限公司 | High exchange formula multistage centrifugal pump of stator |
| CN106812726A (en) * | 2016-12-29 | 2017-06-09 | 西安航天泵业有限公司 | A kind of multistage centrifugal pump |
| CN207033763U (en) * | 2017-07-28 | 2018-02-23 | 浙江科尔泵业股份有限公司 | The steady low formula boiler feed pump that shakes of water conservancy diversion |
-
2017
- 2017-07-28 CN CN201710635998.6A patent/CN108071594A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975168A (en) * | 2010-11-05 | 2011-02-16 | 浙江科尔泵业股份有限公司 | Horizontal axial-suction sectional multistage high-pressure centrifugal pump |
| CN103016408A (en) * | 2012-12-21 | 2013-04-03 | 大连理工大学 | One-dimensional linear hollow guide vane |
| CN103016410A (en) * | 2013-01-04 | 2013-04-03 | 江苏大学 | Space guide vane body with suction surface back vane |
| CN103591051A (en) * | 2013-11-07 | 2014-02-19 | 江苏大学 | Space guide blade with auxiliary vanes |
| CN205654548U (en) * | 2016-05-25 | 2016-10-19 | 浙江科尔泵业股份有限公司 | High exchange formula multistage centrifugal pump of stator |
| CN106812726A (en) * | 2016-12-29 | 2017-06-09 | 西安航天泵业有限公司 | A kind of multistage centrifugal pump |
| CN207033763U (en) * | 2017-07-28 | 2018-02-23 | 浙江科尔泵业股份有限公司 | The steady low formula boiler feed pump that shakes of water conservancy diversion |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180525 |